EP1614901B1 - Structure de recouvrement pour moteur - Google Patents

Structure de recouvrement pour moteur Download PDF

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Publication number
EP1614901B1
EP1614901B1 EP04713682.5A EP04713682A EP1614901B1 EP 1614901 B1 EP1614901 B1 EP 1614901B1 EP 04713682 A EP04713682 A EP 04713682A EP 1614901 B1 EP1614901 B1 EP 1614901B1
Authority
EP
European Patent Office
Prior art keywords
cover
cylinder head
engine
cooling air
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04713682.5A
Other languages
German (de)
English (en)
Other versions
EP1614901A4 (fr
EP1614901A1 (fr
Inventor
Masashi Sagara
Junichi Samo
Toshio Kamiyama
Shinji Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanmar Co Ltd
Original Assignee
Yanmar Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2003068934A external-priority patent/JP4213971B2/ja
Priority claimed from JP2003365904A external-priority patent/JP4328177B2/ja
Application filed by Yanmar Co Ltd filed Critical Yanmar Co Ltd
Publication of EP1614901A1 publication Critical patent/EP1614901A1/fr
Publication of EP1614901A4 publication Critical patent/EP1614901A4/fr
Application granted granted Critical
Publication of EP1614901B1 publication Critical patent/EP1614901B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P1/00—Air cooling
    • F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/06—Combinations of engines with mechanical gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/12—Filtering, cooling, or silencing cooling-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four

Definitions

  • the present invention relates to a structure of an engine cover that covers an upper part of an engine.
  • Japanese Patent Application Publication No. Hei 8-232654 discloses a technique to send cooling air from a fan provided on one side of a cylinder block to the opposite side of the cylinder block, thereby improving cooling efficiency of the engine.
  • the engine is provided with only a structure for guiding cooling air wherein the cylinder head and a cylinder are arranged to be surrounded by an air exhaust flange.
  • attaching of a cover on an engine is an ordinary technique for preventing emission or transmission of vibration, noise, etc. caused by driving an engine.
  • the cover is arranged to cover an overall body of the engine so that the engine must have a large housing.
  • attachment of the cover must be a time and labor consuming task, thereby making maintenance work harder.
  • a different cover is required corresponding to a type of working vehicle to which the engine is mounted. A similar engine is shown in JP 05 047377U .
  • an engine whose cylinder head is covered at three of front, rear, right and left sides thereof by a fuel tank, an air cleaner and a muffler, respectively, comprises a cover which covers the remaining one side and/or a top side of the cylinder head. Due to this structure, the cylinder head can be protected by the cover, and noise caused by the cylinder head can be reduced. Furthermore, the cover can send cooling air from a fan provided on one side of a cylinder block via the cylinder head to an exhaust pipe disposed on the opposite side of the cylinder block, which is an exposed side of the cylinder head where no device such as a muffler is disposed. Therefore, the cylinder head and the exhaust pipe can be cooled.
  • the cover is formed to have an approximate inverse L shape in a section view so as to cover an exposed side of the cylinder head and the top of the cylinder head. Due to this structure, sound insulation is improved to reduce noise caused by the cylinder head. Furthermore, cooling air from a fan provided on one side of the cylinder block can be guided to cool the cylinder head as well as a bonnet cover, etc. disposed over the cylinder head, thereby improving cooling efficiency. Still further, the cover covers the exhaust pipe disposed on the exposed side of the cylinder head, thereby preventing users from accidentally touching the exhaust pipe. In addition, the cover can be used as a means for covering a base portion of a muffler (a joint between the muffler and the exhaust pipe).
  • the cover comprises a side cover to cover the exposed side of the cylinder head and a top cover to cover the top side of the cylinder head. Due to this structure, the cover can be separated into the top cover and the side cover, thereby facilitating attachment of the cover onto the engine. Furthermore, the top cover or the side cover can be removed individually so that parts desired to be detached from the engine can be easily detached, thereby enhancing ease of maintenance.
  • the side cover and the top cover are integrally formed. Due to this structure, attachment work of the cover onto the engine is made easier.
  • the side cover is bent corresponding to a shape of an exhaust pipe disposed on a side surface of the cylinder head. Due to this structure, the side cover covers the exhaust pipe, thereby preventing users from accidentally touching the exhaust pipe.
  • the side cover is disposed on a side of the cylinder head opposite to the air cleaner. Due to this structure, the cylinder head is covered at the front, rear, left and right sides thereof by the muffler, the fuel tank, the air cleaner and the side cover, and also covered by the top cover disposed thereabove, thereby improving sound insulation to reduce noise caused by the cylinder head. Furthermore, the side cover covers an exposed portion of the cylinder, thereby preventing users from accidentally touching the cylinder head, and also improving appearance of the engine.
  • a fan is disposed on one side of a cylinder block beneath the cylinder head, and the side cover is extended to cover another side of the cylinder block opposite to the fan. Due to this structure, the side cover functions as a guiding plate to guide cooling air from the fan to an outer surface of the cylinder block opposite to the fan. Therefore, the whole body of the cylinder head is cooled down, and further the surface of the cylinder block opposite to the fan is also cooled down.
  • the side cover has a notched upper edge portion fixed on a side surface of the top cover. Due to this structure, an operating portion of a decompressor provided on the engine can be disposed at the notched portion without projecting to the outside of the side cover. Therefore, the operating portion of the decompressor can be operated without having to detach the cover from the engine, thereby keeping good appearance of the engine. Furthermore, the top cover and the side cover can be joined to form an approximate inverse L shape, thereby improving appearance of the engine.
  • the side cover is formed on a side surface thereof with an opening. Due to this structure, cooling air can be sufficiently drawn out from the opening, thereby improving cooling efficiency. In addition, weight of the side cover can be reduced by the area of the opening.
  • the side cover has a lower edge portion whose at least one side is perpendicularly bent to form a projection inserted into a slit formed in a main body of the engine so as to attach the side cover to the main body. Due to this structure, the side cover can easily be fixedly positioned with respect to the main body of the engine. Furthermore, a fixed portion can be easily formed in the side cover.
  • the top cover is formed on a top surface thereof with an attachment hole for attachment of the top cover onto the engine, periphery of the attachment hole being funnel-formed and the attachment hole being formed with a slit on an inner side surface thereof. Due to this structure, water is drained through the slit, thereby preventing water from ponding on the top surface of the top cover when, for example, rainwater falls on the top surface of the top cover. Furthermore, water draining structure can be easily formed on the top cover.
  • the top cover is formed on a top surface thereof with a hole for inserting a lifting member and a hole for feeding startup assisting material. Due to this structure, a lifting member for lifting up the engine can be easily attached to the cylinder head without having to detach the top cover from the engine. Therefore, the engine can be easily lifted up only by the lifting member without any additional member such as a guide member attached on the main body of the engine. And, also due to this structure, startup assisting material can be fed from the latter hole without having to detach the top cover from the main body of the engine.
  • an operating portion of a decompressor is disposed below a top surface of the top cover. Due to this structure, the operating portion of the decompressor does not jut out above the top surface of the top cover, thereby keeping good appearance of the engine.
  • the operating portion of the decompressor is provided as a decompressor lever, and the side cover is formed thereon with a hole for inserting a control shaft of the decompressor lever, the decompressor lever being projected to the outside of the side cover. Due to this structure, the decompressor can be controlled with the decompressor lever in a state where the cover is attached on the engine.
  • a cooling air guide for guiding cooling air to a space between a bonnet cover and the top cover disposed over the cylinder head is formed in a cylinder head side of a body of the air cleaner. Due to this structure, cooling air from a fan can be guided and divided by the cooling air guide to cool the bonnet cover and a fuel injection nozzle as well as the cylinder head. Furthermore, the cooling air guide can be easily formed by casting, etc.
  • the cooling air guide is integrally formed on a partition wall formed in the cylinder head side of the body of the air cleaner. Due to this structure, the cooling air guide can be produced cost-effectively because it requires neither special additional part attached onto the body of the air cleaner nor processing of the body.
  • An engine 1 comprises a cylinder block 2 in an upper part thereof and a crankcase 3 in a lower part thereof.
  • a vertically-directed cylinder 2a In the middle of cylinder block 2 is formed a vertically-directed cylinder 2a with a piston 4.
  • Piston 4 is connected via a connection rod 6 to a crankshaft 5 which is pivotally supported by crankcase 3.
  • a balance weight, a governor 11, etc. are disposed within crankcase 3 beneath cylinder block 2.
  • a cam shaft 13, a fuel injection pump 12, etc. are disposed above governor 11.
  • Fuel injection pump 12 draws fuel from a fuel tank 10 by pushing and pulling a plunger of fuel injection pump 12 with a pump-driving cam 14 provided on cam shaft 13 at the center thereof in the fore-and-aft direction, and supplies a certain amount of fuel to a fuel injection nozzle 15 via a high-pressure pipe 19 at a certain timing.
  • the amount of fuel injection from nozzle 15 can be controlled by turning a control lever 16 of fuel injection pump 12 to change a stroke of the plunger.
  • cylinder block 2 On cylinder block 2 is disposed a cylinder head 7, inside of which a suction valve 31, an exhaust valve 32 and fuel injection nozzle 15 are disposed.
  • a bonnet cover 8 is provided on cylinder head 7 forming a rock arm chamber 8a, within which upper end portions of respective suction valve 31 and exhaust valve 32, upper end portions of respective rock arms 27 and 28 and a pushrod 25, etc. are disposed.
  • Three out of four sides (front, rear left and right sides) of cylinder head 7 and bonnet cover 8 are surrounded by a muffler 9, fuel tank 10 and an air cleaner 20.
  • muffler 9, fuel tank 10 and air cleaner 20 are respectively disposed in the right, left and rear sides of cylinder head 7.
  • the remaining side (front side) and an upper side of cylinder head 7 are respectively covered with a side cover 51 and a top cover 55 of a cover 50.
  • a fan 35 is disposed on one side (rear side) of cylinder block 2 under air cleaner 20.
  • Fan 35 consists of a flywheel 35a which is fixed on one end of crankshaft 5 and integrally formed with fins 35b on a peripheral portion of an outer side surface thereof.
  • Fan 35 is covered by a fan case 36. By rotating fan 35, air is drawn into fan case 36 from outside and then sent toward cylinder block 2, cylinder head 7, etc. to cool them. The air is also supplied to air cleaner 20.
  • suction valve 31 (exhaust valve 32) comprises a valve head 31a (32a) as a bottom part thereof and a valve rod 31b (32b) as a body part thereof and is disposed over piston 4.
  • Valve head 31a (32a) is arranged so that it can be fitted or separated on and from a valve seat formed on a bottom surface of cylinder head 7, thereby connecting or disconnecting a suction port 7a (a exhaust port 7b) formed in cylinder head 7 to and from an inside space of cylinder 2a formed in cylinder block 2.
  • Suction port 7a is connected to air cleaner 20 provided behind cylinder head 7.
  • Exhaust port 7b is connected to muffler 9 via an exhaust pipe 34 provided before cylinder head 7.
  • Valve rod 31b (32b) is slidably inserted into cylinder head 7 and projecting upward to the bonnet cover 8 side. A top end of valve rod 31b (32b) is contacted with a rock arm 27 (28). Inside rock arm chamber 8a, a spring 33 (33) is put on valve rod 31b (32b) so that valve head 31a (31b) is biased to slide upward and shut suction valve 31 (exhaust valve 32).
  • Fuel injection nozzle 15 is disposed between suction valve 31 and exhaust valve 32. Fuel injection nozzle 15 is inserted into cylinder head 7 and projects downward with a tip thereof (an injecting portion) positioned above a center of cylinder 2a. Fuel injection nozzle 15 is connected at the other end thereof to high pressure pipe 19 extending from fuel injection pump 12 so as to inject fuel supplied from fuel injection pump 12 into cylinder 2a.
  • Cylinder head 7 and bonnet cover 8 are pierced at one ends thereof by a vertical connecting hole 37.
  • Connecting hole 37 is connected to suction port 7a.
  • Startup-assisting material is injected into cylinder 2a from connecting hole 37 through suction port 7a for assisting smooth startup of an engine under the condition of low temperature.
  • connecting hole 37 is normally plugged with a cap 38 to prevent an extraneous substance from entering into cylinder 2a and mixing with internal air.
  • a decompressor 39 is provided on bonnet cover 8.
  • Decompressor 39 forcedly opens exhaust valve 32 or suction valve 31 at engine startup in order to decrease a compressive force inside cylinder 2a and reduce a cranking force, thereby enhancing starting performance of the engine.
  • decompressor 39 is typically provided on exhaust valve 32.
  • Decompressor 39 comprises a control shaft 39a pivotally supported by bonnet cover 8 and a decompressor lever 39b attached to control shaft 39a as an operating portion.
  • Control shaft 39a of decompressor 39 is disposed horizontally in the fore-and-aft direction, and turnably supported by bonnet cover 8.
  • Decompressor lever 39b is integrally fixed on one end of control shaft 39a projecting forward to the outside.
  • the other end of control shaft 39a projecting into the inside of rock arm chamber 8a is formed with a notched semicylindrical contacting portion 39c.
  • Contacting portion 39c is arranged so that it can contact with rock arm 28. Therefore, as control shaft 39a is turned by decompressor lever 39b, contacting portion 39c comes to contact with rock arm 28 and push it. Then, rock arm 28 pushes exhaust valve 32 and slides it downward against the biased force of the spring, thereby opening exhaust valve 32. Therefore, when piston 4 moves upward, air inside cylinder 2a is not compressed as it is exhausted from exhaust valve 32. As a result, crankshaft 5 can be rotated with a little driving force.
  • air cleaner 20 comprises a body 40, a cover 41 and an element 42.
  • Cover 41 is fixed on body 40 via a seal member 43.
  • Element 42 is contained between cover 41 and body 40.
  • air cleaner 20 is constructed in the following way: Body 40 is formed with a step-like shaped inward recess portion 40a so as to fit to periphery of element 42, element 42 is fitted via seal member 44 into recess portion 40a and fastened to body 40 by a bolt 45 with a nut 46, and finally, cover 71 is fixed to element 42 with a nut 47.
  • a suction opening 20a is formed at a bottom part of air cleaner 20 for sucking air directly from outside or from fan case 36.
  • Suction opening 20a is formed by a cutaway part in a bottom periphery of cover 41 when cover 41 is fixed on body 40.
  • Suction opening 20a opens downward so as to suck air into air cleaner 20 from outside.
  • a suction hole 40j which serves as a flow path for air, is formed at a central part of body 40. Suction hole 40j and suction port 7a of cylinder head 7 are connected with each other.
  • Partition wall 40b extends horizontally from a vertically middle part of body 40.
  • Partition walls 40c are extended continuously from partition wall 40b and toward cylinder head 7 at both sides of a bottom part of body 40.
  • Partition wall 40d is approximately U-shaped in a bottom view and extended downward from a bottom part of body 40 on the opposite side to the cylinder head 7.
  • Partition walls 40b and 40c are formed therein with bolt holes for attachment of body 40 to cylinder head 7.
  • partition wall 40b and partition wall 40c are integrally formed at respective middle parts thereof with respective upwardly projecting cooling air guides 40e and 40f.
  • cooling air guides 40e and 40f are positioned over a top surface of cylinder head 7 to respectively form openings 48 and 49 so that a space formed between partition walls 40b, 40c and 40d and cylinder head 7 is fluidly connected to a space formed between a later-discussed top cover 55 of cover 50 and cylinder head 7.
  • cooling air guides 40e and 40f of partition walls 40b and 40c so as not to be sent into cylinder head 7 but to be sent from openings 48 and 49 to a space between bonnet cover 8 and top cover 55 over cylinder head 7.
  • cooling air guides 40e and 40f which serve as intakes of cooling air into the space between bonnet cover 9 and top cover 55 over cylinder head 7, are formed in the cylinder head 7 side of body 40 of air cleaner 20. Therefore, cooling air guides 40e and 40f can guide cooling air sent from fan 35 to bonnet cover 8 to cool it as well as cylinder head 7. Furthermore, cooling air guides 40e and 40f can be easily formed by casting, etc.
  • cooling air guides 40e and 40f are integrally formed on respective partition walls 40b and 40c which are formed in the cylinder head 7 side of body 40 of air cleaner 20 so that there is no need for any special additional part or for processing for body 40, thereby being produced cost-effectively.
  • Cover 50 comprises side cover 51 and top cover 55. While the upper part of the engine includes cylinder head 7 covered at three of front, rear, left and right sides thereof with muffler 9, fuel tank 10 and air cleaner 20, side cover 51 is arranged at the upper part of the engine so as to cover the remaining one side of cylinder head 7. Top cover 55 is arranged to cover the top of cylinder head 7 and bonnet cover 8. Cover 50, which covers both the remaining side and the top of cylinder head 7 in the present embodiment, may be arranged to cover at least one of the remaining side and the top of cylinder head 7. Cover 50 may be arranged to cover a wider area in addition to the exposed part of cylinder head 7.
  • side cover 51 is placed on the front side of cylinder head 7 which is not covered by any of muffler 9, fuel tank 10 and air cleaner 20.
  • Side cover 51 is arranged to also cover exhaust pipe 34 disposed in front of cylinder head 7 and to cover the corresponding side of an upper part of cylinder block 2.
  • Side cover 51 is formed to have a hat-like shape and, in a rear view, to have an approximately trapezoidal shape.
  • a vertically middle part of side cover 51 which serves as a part to cover exhaust pipe 34, projects forward to form a projecting portion 52 whose right and left sides are opened.
  • Projecting portion 52 is formed in such a way that a vertical width thereof is increased in the direction from cylinder head 7 to muffler 9 so as to fit the shape of exhaust pipe 34.
  • side cover 51 is formed on a front surface thereof with plural openings 52a, 52b and 52c.
  • openings 52a, 52b and 52c are three vertically long openings formed on projecting portion 52 of side cover 51 at regular intervals.
  • the number and the shape of openings are not to be specified.
  • more than three openings may be provided on projecting portion 52.
  • heat may be exhausted through right and left sides or top and bottom sides of side cover 51 without any openings provided. Any arrangement is possible of side cover 51 for exhausting heat only if exhaust pipe 34 is prevented from being directly contacted by side cover 51.
  • side cover 51 has a lower edge portion 53 whose at least one side is squarely bent so as to form a projection 53a.
  • a vertical slit 2b is formed through plural laterally horizontal fins for radiating heat projecting from a front side of a main body of engine 1 (cylinder block 2).
  • a recess 54a which is approximately V-shaped in a side view, is formed in an upper end portion 54 of side cover 51.
  • Recess 54a has a closed arcuate end part 54c which is disposed on the axial line of control shaft 39a of decompressor 39 projecting forward from bonnet cover 8 when side cover 51 is attached on the main body of engine 1.
  • Decompressor lever 39b on the outer end of control shaft 39a is positioned in recess 54a lower than the top of projecting part 52 of side cover 51, that is, in a receding part of side cover 51. Therefore, decompressor lever 39b does not protrude to the outside of side cover 51, thereby keeping good appearance of engine 1.
  • recess 54a may also be easily formed by punching, etc.
  • the shape of recess 54a is not limited.
  • side cover 51 is provided at lower end portion 53 thereof with an attachment hole 53b for attachment of side cover 51 to the main body of the engine (cylinder block 2), and at upper end portion 54 thereof with plural attachment holes 54b and 54b for attachment of side cover 51 to top cover 55.
  • a nut 68 is fixed on the inner side of upper end portion 54 of side cover 51 to correspond to attachment hole 54b.
  • Top cover 55 is disposed over cylinder head 7 to cover cylinder head 7, bonnet cover 8, etc.
  • Top cover 55 is approximately rectangularly shaped, and a top surface 56 of top cover 55 is bent vertically downward at right, left and front sides thereof to form respective edge portions 57, 58 and 59.
  • Top cover 55 is provided on top surface 56 thereof with plural attachment holes 56a for attachment of top cover 55 to the main body of the engine.
  • four attachment holes 56a are provided, which are respectively arranged at four corners of top surface 56 of top cover 55.
  • each attachment hole 56a is formed into a funnel shape having a peripherally lowered central part.
  • a slit 56b is formed on the inner side surface of each attachment hole 56a. Therefore, top surface 56 of top cover 55 fixed with bolts or the like is prevented from ponding of rainwater dropping thereon since the rainwater is drained through slit 56b. In this way, water draining structure is easily formed by providing slit 56b.
  • top cover 55 is formed on top surface 56 thereof with a lifting member insertion hole 56c and a startup assisting material injection hole 56d.
  • lifting member insertion hole 56c is positioned to correspond to a bolt hole 61 formed on the top surface of cylinder head 7.
  • Lifting member insertion hole 56c is normally closed with a bolt.
  • an attachment member such as an eyebolt, is screwed through lifting member insertion hole 56c into a boss or the like formed in cylinder head 7. Therefore, when engine 1 is transferred or engine 1 is installed on a working vehicle, engine 1 can be lifted by use of a lifting member easily attached on cylinder head 7 without removing top cover 55 from engine 1.
  • engine 1 requires no additional member such as a guide member onto the main body thereof to be lifted since engine 1 can be easily lifted by only the lifting member.
  • Startup assisting material injection hole 56d is positioned so that an opening thereof corresponds to the connecting hole 37 formed on bonnet cover 8 and cylinder head 7.
  • Startup assisting material injection hole 56d has a width enough to pass cap 38 fitted into connecting hole 37 therethrough, so that cap 38 can be removed from startup assisting material injection hole 56d while keeping top cover 55 attached on the main body of engine 1. Therefore, startup assisting material can be injected into cylinder 2a from startup assisting material injection hole 56d via connecting hole 37 by opening connecting hole 37 without removing top cover 55 from the main body of engine 1.
  • edge portion 59 which doesn't contact with any of muffler 9, fuel tank 10 and air cleaner 20, is formed thereon with plural attachment holes 59a and 59a for attachment of side cover 51 onto top cover 55. Further, edge portion 59 is formed in a lower end part thereof with a notched arcuate portion 59b that faces arcuate portion 54c of recess 54a formed on upper end portion 54 of side cover 51.
  • Top cover 55 of cover 50 is attached on body 40 of air cleaner 20, cylinder head 7 and bonnet cover 8.
  • Side cover 51 of cover 50 is attached on cylinder block 2 and top cover 55.
  • Body 40 of air cleaner 20 is formed in a cylinder head side thereof with projecting boss portions 40g and 40g for attachment of top cover 55.
  • Each boss portion 40g is formed with a vertical bolt hole 40h.
  • attachment holes 56a formed on top cover 55 attachment holes 56a and 56a disposed in the air cleaner 20 side of top cover 55 are arranged to correspond to bolt holes 40h of boss portions 40g. Then, a bolt 64 is screwed into bolt hole 40h of boss portion 40g through attachment hole 56a of top cover 55 and an interposal member 65, such as a rubber cushion, thereby fastening top cover 55 onto body 40 of air cleaner 20.
  • top cover 55 On the top surfaces of cylinder head 7 and bonnet cover 8 are formed respective vertical bolt holes 62 and 63 for attachment of top cover 55.
  • the remaining attachment holes 56a and 56a of top cover 55 are arranged to correspond to respective bolt holes 62 and 63.
  • bolts 64 and 64 are screwed into bolt holes 62 and 63 through attachment holes 56a of top cover 55, interposal members and bosses, respectively, thereby fastening top cover 55 onto cylinder head 7 and bonnet cover 8.
  • side cover 51 is arranged to cover exhaust pipe 34 with projecting portion 52, and projection 53a on lower end portion 53 of side cover 51 is inserted into slit 2b formed on the side surface of cylinder block 2, thereby positioning and fixing side cover 51.
  • attachment hole 53b formed on lower end portion 53 of side cover 51 is arranged to correspond to the bolt hole in boss portion 2c projecting from the front surface of cylinder block 2. Then, a bolt 66 is screwed into the bolt hole of boss portion 2c through attachment hole 53b of side cover 51 and an interposal member 67, thereby fastening side cover 51 onto cylinder block 2.
  • upper end portion 54 of side cover 51 is fitted onto front edge portion 58 of top cover 55 so that attachment holes 59a and 59a on front edge portion 58 correspond to respective attachment holes 54b and 54b on upper end portion 54 of side cover 51.
  • a bolt 69 is screwed into nut 68 on upper end portion 54 interposing through attachment holes 54b and 59a, thereby fastening side cover 51 onto top cover 55.
  • top cover 55 and side cover 51 are joined so as to form approximately inverse L-like shaped cover 50, thereby achieving better appearance of engine 1.
  • top cover 55 and side cover 51 may be integrally formed. In this case, attachment of cover 50 onto engine 1 is made easier.
  • a circular opening is formed by fitting arcuate portion 54c of recess 54a formed in upper end portion 54 of side cover 51 and arcuate portion 59b formed in front edge portion 59 of top cover 55.
  • Control shaft 39a of decompressor 39 is protruded from the opening.
  • Decompressor lever 39b fixed on the outside end of control shaft 39a is positioned below top surface 56 of top cover 55 and above projecting portion 52 of side cover 51 so as not to protrude to the outside of top cover 55 and side cover 51. Therefore, decompressor 39 is operable by decompressor lever 39b in the state that cover 50 is attached on engine 1, thereby keeping good appearance of engine 1.
  • top cover 50 is made up of separable top cover 55 and side cover 51, thereby facilitating attachment of cover 50 onto engine 1. Furthermore, maintenance of engine 1 is also facilitated because top cover 55 or side cover 51 can be removed separately from engine 1 so that parts desired to be detached from engine 1 can be easily detached.
  • cylinder head 7 is covered by cover 50 which blocks out noise caused by cylinder head 7. More in detail, the noise caused by cylinder head 7 is reduced because three sides (out of front, rear, left and right sides) of cylinder head 7 are covered by fuel tank 10, air cleaner 20 and muffler 9, the remaining one side of cylinder head 7 is covered by side cover 51, and the upper side of cylinder head 7 is covered by top cover 55.
  • side cover 51 covers exhaust pipe 34 which is disposed in the exposed side of cylinder head 7, that is, in the side where devices such as muffler 9 are not disposed.
  • cover 50 attached on the main body of engine 1 as described above functions as a guiding plate to guide the cooling air from fan 35 to exhaust pipe 34 disposed on the opposite side to fan 35.
  • cooling air from fan 35 is guided by fan case 36 and sent out upward from an upper end portion of fan case 36 to a space between cylinder head 7 and air cleaner 20.
  • the cooling air is guided and divided by partition walls 40b, 40c and 40d and cooling air guides 40e and 40g formed on body 40 of air cleaner 20.
  • a part of the cooling air is led into a space between top cover 55 and bonnet cover 8 from openings 48 and 49 formed by cooling air guides 40e and 40g.
  • the cooling air flows forward to exhaust pipe 34 along top cover 55, bonnet cover 8 and cylinder head 7, and, finally, is let out from the right and left sides and openings 52a, 52b and 52c of projecting portion 52 of side cover 51.
  • cover 50 serves as a guide plate for guiding cooling air from fan 35 to exhaust pipe 34 via cylinder head 7. Therefore, cylinder head 7, bonnet cover 8, and exhaust pipe 34 disposed on the opposite side to cylinder head 7 can be cooled by the cooling air.
  • the rest of the divided cooling air is led into cylinder head 7 by partition walls 40b, 40c and 40d.
  • the cooling air cools cylinder head 7 from the inside thereof.
  • the cooling air reunites with the other divided part of cooling air getting out of the space between top cover 55 and bonnet cover 8, and, finally, the reunited cooling air is let out from the right and left sides and openings 52a, 52b and 52c of projecting portion 52 of side cover 51.
  • cooling air from fan 35 also flows through a space between cylinder block 2 and muffler 9 and through a space between cylinder block 2 and fuel tank 10.
  • the cooling air passes through the space between cylinder block 2 and muffler 9 and the space between cylinder block 2 and fuel tank 10 cooling these devices, and, finally, it is drawn out from the lateral sides of side cover 51.
  • cylinder head 7 is covered at three sides (out of front, rear, left and right sides) thereof by muffler 9, fuel tank 10 and air cleaner 20.
  • a cover 70 is provided to cover the remaining side and an upper side of cylinder head 7.
  • Cover 70 is formed to have an approximate inverse L shape in a section view, and arranged to protect exposed portions of cylinder head 7, bonnet cover 8, etc. and to reduce noise caused by cylinder head 7, bonnet cover 8, etc.
  • cover 70 is spaced from cylinder head 7 so that a top surface of cover 70 is substantially aligned with one, two or all of top surfaces of muffler 9, fuel tank 10 and air cleaner 20, and a side surface of cover 70 is substantially aligned with at least one of side surfaces (front surfaces) of muffler 9 and fuel tank 10. In this way, projections and depressions on the outer surface of engine 1 are reduced, thereby improving appearance of engine 1.
  • cover 70 comprises a horizontal top cover 71 as an upper part thereof and a vertical side cover 72 as a side part thereof.
  • Top cover 71 is substantially rectangular in a plan view, and right and left sides thereof are bent vertically downward to form edge portions.
  • Top cover 71 may be made of, for example, vibration absorbing steel plate in order to improve sound insulation.
  • Side cover 72 is bent twice in a vertically middle part thereof toward the cylinder side so as to have steps fitting the shape of exhaust pipe 34 disposed on the front surface of cylinder head 7. Also, side cover 72 is formed on a top surface thereof with a later-discussed insertion hole 72a.
  • Cover 70 may comprise separate top cover 71 and side cover 72 which are mutually joined with bolts or other means. Alternatively, cover 70 may be made of a single member.
  • Cover 70 is attached on engine 1, being supported by housing portions of respective fuel tank 10 and air cleaner 20 and by an outer surface of cylinder block 2. Alternatively, cover 70 may be supported by bonnet cover 8 or cylinder head 7.
  • fuel tank 10 is formed with an indented support portion 10a projecting from the housing portion thereof.
  • a rubber cushion 74 is pressed in an indent of indented support portion 10a.
  • Rubber cushion 74 is formed at a top thereof with a slit into which an end of cover 70 is inserted.
  • indented support portion 70a itself may be made up of vibration absorbing members.
  • the above-described three edge portions of top cover 71 are bent squarely and extending vertically downward. One of these downward extending portions is disposed on a fuel tank 10 side to be fitted in upwardly opened indented support portion 10a.
  • fuel tank 10 is also formed on the front side thereof with another indented support portion 10a projecting from the housing portion.
  • Side cover 72 is squarely bent and extended rearward at right and left edge portions thereof. The rearward extending edge portion of side cover 72 on the fuel tank 10 side corresponds to forwardly opened indented support portion 10a. In this way, cover 70 is attached onto fuel tank 10 by pressing cover 70 into engine 1 from the upper front side thereof.
  • air cleaner 20 is formed on a top surface of the housing portion thereof with a projecting attachment portion 20b for attachment of cover 70.
  • Attachment portion 20b is formed thereon with bolt holes extending downward from the top surface thereof.
  • top cover 71 is formed with insertion holes 71a and 71a so as to overlap the bolt holes formed on attachment portion 20b in a plan view in the state that cover 70 is attached on engine 1.
  • Bolts 75 are screwed into the respective bolt holes of attachment portion 20b through insertion hole 71a of top cover 71 and rubber cushion 76 as an interposal member, thereby supporting cover 70 onto air cleaner 20.
  • rubber cushion 76 is also formed thereon with insertion holes for inserting bolts 75.
  • cylinder block 2 is formed on a front surface thereof with a projecting attachment portion 2d for attachment of cover 70.
  • Attachment portion 2d is formed with bolt holes extending rearward from the front surface thereof.
  • side cover 72 of cover 70 is formed with insertion holes 72b and 72b so as to overlap the bolt holes formed on attachment portion 2d of cylinder block 2 in a plan view in the state that cover 70 is attached on engine 1.
  • Bolts 75 are screwed into the respective bolt holes on attachment portion 2d through insertion hole 72b on side cover 72 and rubber cushion 76 as an interposal member, thereby firmly supporting side cover 72 onto cylinder block 2.
  • cover 70 is supported on the housing portion of fuel tank 10 and air cleaner 20 and the outer surface of cylinder block 2.
  • cover 70 can be vibratory-isolatingly supported on the main body of the engine, thereby improving sound insulation to reduce noise.
  • cooling air from fan 35 can be guided by cover 70 so as to be led into a space between cylinder head 7 and cover 70, thereby improving the efficiency of cooling cylinder head 7, bonnet cover 8, etc.
  • cover 70 covers exhaust pipe 34 so that users are prevented from accidentally touching exhaust pipe 34. Furthermore, cover 70 can be used as a means for covering a base portion of muffler 9 (a joint between muffler 9 and exhaust pipe 34).
  • cover 70 on the housing portions of the above-mentioned devices does not always require rubber cushions 74 and 76.
  • cover 70 may be fixed onto engine 1 by means of direct bolting, for example, without any vibration-absorbing interposal member.
  • cover 70 is made up of a bending-pressed metal plate member. For this reason, cover 70 is vibratory-isolatingly supported on the main body of engine 1 so as to be prevented from resonating with engine 1 to cause metallic noise when engine 1 is driven.
  • cover 70 is made up of a metallic plate member and vibratory-isolatingly supported on the main body of engine 1 via a rubber cushion 74 which is an elastic member.
  • a cover itself may be made up of an elastic member such as a resinous member, for example, to have vibration-absorbing effect. Any other configuration is possible as long as the cover is attachable on engine 1.
  • Side cover 72 of cover 70 is formed on a top surface thereof with an insertion hole 72a for inserting control shaft 39a of decompressor 39.
  • Control shaft 39a projects to the outside from insertion hole 72a.
  • On the outer end of control shaft 39a is fixed decompressor lever 39b.
  • the diameter of insertion hole 72a substantially corresponds to the outer diameter of control shaft 39a. Therefore, an exposed area of cylinder head 7 in insertion hole 72a is negligibly small.
  • decompressor lever 39b is arranged outside side cover 72 to be operable for controlling decompressor 39 while keeping the silent condition that cover 70 is attached on engine 1.
  • decompressor lever 39b serves as the above-mentioned operating portion of decompressor 39, and does not jut out above cover 70, thereby keeping good appearance of the top surface of engine 1.
  • fan case 36 containing fan 35 is disposed on one side (rear side) of cylinder block 2. Cooling air from fan 35 is guided by fan case 36 to be sent out to the other side (the opposite side to the one side, namely, the front side) and the upper side of cylinder block 2.
  • the cooling air cools the rear surface of cylinder head 7, and further cools the side surfaces of cylinder block 2, cylinder head 7, etc. while passing through cylinder block 2 and through a space between cylinder head 7 and devices such as muffler 9 and fuel tank 10.
  • side cover 72 of cover 70 is extended to the front side of cylinder block 2 so as to cover the front side (the opposite side to fan 35) of cylinder block 2.
  • cover 70 which is arranged to cover the top side and the one side (front side) of cylinder block 2, functions as an air guiding plate to lead cooling air from fan 35 to the opposite side of cylinder block 2 to fan 35.
  • cooling air from fan 35 is sent out from a top of fan case 36 and flows upward through a space between cylinder head 7 and air cleaner 20. Then, the cooling air flows forward through a space between top cover 71 and bonnet cover 8, and, finally, it flows downward through a space between side cover 72 and cylinder head 7.
  • cooling air from fan 35 is guided by cover 70 to cool cylinder head 7, bonnet cover 8, etc.
  • cooling air also flows through a space between muffler 9, fuel tank 10 and cylinder block 2 to cool cylinder block 2.
  • muffler 9 and fuel tank 10 are disposed on the left and right sides of cylinder head 7, respectively.
  • Air cleaner 20 is disposed on the rear side of cylinder head 7 (one of the sides where neither muffler 9 nor fuel tank 10 are disposed).
  • top cover 70 which is formed to have an approximate inverse L shape in a section view, comprises top cover 71 and side cover 72.
  • Side cover 72 is disposed on the opposite side of cylinder head 7 to air cleaner 20 (that is, on the front side of cylinder head 7).
  • cylinder head 7 the front, rear, left and right sides of cylinder head 7 are covered by side cover 72, air cleaner 20, fuel tank 10 and muffler 9, respectively, and the top of cylinder head 7 is covered by top cover 71.
  • top cover 71 the top and the four sides of cylinder head 7, bonnet cover 8, etc. are all covered, thereby improving sound insulation to reduce noise generated from cylinder head 7, bonnet cover 8, etc.
  • the engine cover structure according to the present invention has the merit of improving sound insulation so that noise generated from the cylinder head is reduced, and also has the merit that the cylinder head and the exhaust pipe are cooled by cooling air from the fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)

Claims (14)

  1. Moteur (1), comprenant une culasse (7), un bloc-cylindres (2) sous la culasse (7), et un ventilateur (35) disposé sur un côté du bloc-cylindres (2),
    attendu que la culasse (7) est couverte sur trois de ses surfaces, parmi des surfaces latérales avant, arrière, droite et gauche, respectivement par un réservoir de carburant (10), un filtre à air (20), et un silencieux d'échappement (9) ;
    attendu que la surface latérale de la culasse (7) couverte par le filtre à air (20) est disposée sur le même côté que le côté du bloc-cylindres (2) sur lequel est disposé le ventilateur (35) ;
    attendu qu'un tuyau d'échappement (34) est disposé le long d'une surface latérale restante de la culasse (7) face au filtre à air (20), et
    attendu que le moteur (1) est doté d'un couvercle (50, 70) incluant un couvercle latéral (51, 72) disposé le long de la une surface latérale restante de la culasse (7) de manière à couvrir le tuyau d'échappement (34), attendu que le couvercle (50, 70) sert de plaque de guidage pour guider un air de refroidissement du ventilateur (35) vers le tuyau d'échappement (34) dans un espace entre le couvercle latéral (51, 72) et la culasse (7) ;
    caractérisé en ce que
    le couvercle (50, 70) inclut un couvercle de dessus (55, 71) couvrant la culasse (7) de manière à guider le flux d'air de refroidissement à partir du ventilateur (35) le long du couvercle de dessus (55, 71) par-dessus la culasse (7),
    dans lequel le couvercle de dessus (55) couvre un capot protecteur (8) disposé sur la culasse (7), et dans lequel le filtre à air (20) présente un corps (40) formé avec un guide d'air de refroidissement (40e, 40f) afin de guider l'air de refroidissement du ventilateur (35) vers un espace défini par le capot protecteur (8), le couvercle de dessus (55), et la culasse (7), et
    dans lequel le corps (40) du filtre à air (20) est formé avec une cloison de séparation (40b, 40c) faisant face à la culasse (7), et dans lequel le guide d'air de refroidissement (40e, 40f) est formé sur la cloison de séparation (40b, 40c) de manière à définir une ouverture (48, 49) au-dessus d'un haut de la culasse (7), de sorte que l'air de refroidissement provenant du ventilateur (35) circule à travers l'ouverture (48, 49) jusque dans l'espace défini par le capot protecteur (8), le couvercle de dessus (55), et la culasse (7).
  2. Moteur selon la revendication 1, dans lequel le couvercle (50, 70) et le réservoir de carburant (10) sont agencés de sorte que l'air de refroidissement provenant du ventilateur (35) circule à travers un espace entre la culasse (7) et le réservoir de carburant (10).
  3. Moteur selon la revendication 1 ou 2, dans lequel le couvercle (50, 70) et le réservoir de carburant (10) sont agencés de sorte que l'air de refroidissement provenant du ventilateur (35) circule à travers un espace entre le bloc-cylindres (2) et le réservoir de carburant (10).
  4. Moteur selon l'une quelconque des revendications 1 à 3, dans lequel le couvercle latéral (51, 72) inclut une portion supérieure (52) couvrant le tuyau d'échappement (34), et inclut une portion inférieure (53) étendue vers le bas à partir de la portion supérieure (52) du couvercle latéral (51, 72) jusqu'à une surface latérale du bloc-cylindres (2) face au ventilateur (35).
  5. Moteur selon la revendication 4, dans lequel le couvercle latéral (51, 72) est courbé afin de correspondre à une forme du tuyau d'échappement (34) afin de former la portion supérieure (52) couvrant le tuyau d'échappement (34) et la portion inférieure (53) placée sur le bloc-cylindres (2).
  6. Moteur selon la revendication 4 ou 5, dans lequel la portion inférieure (53) du couvercle latéral (51) présente au moins un côté courbé pour former une saillie (53a) introduite dans une fente (2b) formée dans le bloc-cylindres (2) afin d'attacher le couvercle latéral (51) sur le bloc-cylindres (2).
  7. Moteur selon l'une quelconque des revendications 1 à 6, dans lequel le couvercle latéral (51) est prévu sur une surface latérale de celui-ci avec une ouverture (52a, 52b, 52c) à travers laquelle l'air de refroidissement est extrait de l'espace entre la culasse (7) et le couvercle latéral (51).
  8. Moteur selon l'une quelconque des revendications 1 à 7, dans lequel le couvercle latéral (51, 72) et le couvercle de dessus (55, 71) sont agencés suivant une forme approximativement en L inversé dans une vue de coupe transversale de manière à guider l'air de refroidissement circulant le long du couvercle de dessus (55, 71) vers le tuyau d'échappement (34) dans l'espace entre le couvercle latéral (51, 72) et la culasse (7).
  9. Moteur selon l'une quelconque des revendications 1 à 8, dans lequel le couvercle latéral (72) et le couvercle de dessus (71) sont formés d'un seul tenant.
  10. Moteur selon l'une quelconque des revendications 1 à 9, dans lequel le couvercle latéral (51) présente une portion de bord supérieure (54) dotée d'une encoche (54a) à fixer sur une surface latérale (59) du couvercle de dessus (55).
  11. Moteur selon l'une quelconque des revendications 1 à 10, dans lequel le couvercle de dessus (55) est formé sur une surface de dessus (56) de celui-ci avec un trou d'attache (56a) destiné à attacher le couvercle de dessus (55) sur le moteur (1), dans lequel une périphérie du trou d'attache (56a) est formée en entonnoir, et dans lequel le trou d'attache (56a) est formé avec une fente (56b) sur une surface latérale intérieure de celui-ci.
  12. Moteur selon l'une quelconque des revendications 1 à 11, dans lequel le couvercle de dessus (55) est formé sur une/la surface de dessus (56) de celui-ci avec un trou (56c) pour introduire un élément de levage et un trou (56d) pour alimenter un matériau d'assistance au démarrage.
  13. Moteur selon l'une quelconque des revendications 1 à 12, dans lequel une portion de manoeuvre d'un décompresseur (39) est disposée sous une/la surface de dessus (56) du couvercle de dessus (55, 71).
  14. Moteur selon la revendication 13, dans lequel un levier de décompresseur (39b) sert de portion de manoeuvre d'un décompresseur (39), et dans lequel un arbre de manoeuvre (39a) du levier de décompresseur (39) est passé à travers un trou (54c, 72a) formé dans le couvercle latéral (51, 72), de sorte que le levier de décompresseur (39b) fait saillie vers l'extérieur du couvercle latéral (51, 72).
EP04713682.5A 2003-03-13 2004-02-23 Structure de recouvrement pour moteur Expired - Lifetime EP1614901B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003068934A JP4213971B2 (ja) 2003-03-13 2003-03-13 空冷エンジンの遮音カバー構造
JP2003365904A JP4328177B2 (ja) 2003-10-27 2003-10-27 エンジンのカバー
PCT/JP2004/002091 WO2004081386A1 (fr) 2003-03-13 2004-02-23 Structure de recouvrement pour moteur

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EP1614901A1 EP1614901A1 (fr) 2006-01-11
EP1614901A4 EP1614901A4 (fr) 2007-06-13
EP1614901B1 true EP1614901B1 (fr) 2018-12-26

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US (1) US7191753B2 (fr)
EP (1) EP1614901B1 (fr)
KR (1) KR101074973B1 (fr)
TW (1) TW200506187A (fr)
WO (1) WO2004081386A1 (fr)

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DE102011120471A1 (de) 2011-12-07 2013-06-13 Andreas Stihl Ag & Co. Kg Arbeitsgerät
DE102011120465A1 (de) 2011-12-07 2013-06-13 Andreas Stihl Ag & Co. Kg Verbrennungsmotor mit einem Kraftstoffsystem
DE102011120464A1 (de) * 2011-12-07 2013-06-13 Andreas Stihl Ag & Co. Kg Arbeitsgerät
CN102606302A (zh) * 2012-03-27 2012-07-25 重庆长安汽车股份有限公司 发动机装饰罩和谐振腔的集成体
US9617951B2 (en) * 2014-05-06 2017-04-11 Champion Engine Technology, LLC Air flow guide for an internal combustion engine
FR3057750B1 (fr) * 2016-10-24 2018-11-16 Seb S.A. Appareil electromenager de preparation culinaire chauffant presentant un conduit d’evacuation
JP6432631B2 (ja) * 2017-03-24 2018-12-05 マツダ株式会社 エンジンの上部構造
AU2019202008B2 (en) * 2019-03-20 2024-06-20 Aeroklas Asia Pacific Group Pty Ltd Air Compressor
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Publication number Publication date
WO2004081386A1 (fr) 2004-09-23
TWI322222B (fr) 2010-03-21
EP1614901A4 (fr) 2007-06-13
KR20050120757A (ko) 2005-12-23
US7191753B2 (en) 2007-03-20
KR101074973B1 (ko) 2011-10-18
US20060048742A1 (en) 2006-03-09
EP1614901A1 (fr) 2006-01-11
TW200506187A (en) 2005-02-16

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